sudokuAlt: Tools for Making and Spoiling Sudoku Games

Tools for making, retrieving, displaying and solving sudoku games.
This package is an alternative to the earlier sudoku-solver package,
'sudoku'. The present package uses a slightly different algorithm, has a
simpler coding and presents a few more sugar tools, such as plot and print
methods. Solved sudoku games are of some interest in Experimental Design
as examples of Latin Square designs with additional balance constraints.